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Photo by Kayleigh Petrie Michigan natives and visitors alike have been marveling at the site of the blue ice that has been piling up on the Straits of Mackinac. Seeing nature at this level is a phenomenon normally only seen in glaciers. Although the ice appears blue, it’s actually not. Blue ice happens when snow falls onto a glacier, for example, and is compressed. Air bubbles are then squeezed out and the ice crystals enlarge, which gives the ice its blue appearance. Smaller amounts of regular ice look to be white because of air bubbles inside them.